Journal
MACROMOLECULES
Volume 53, Issue 1, Pages 165-173Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.9b02395
Keywords
-
Categories
Funding
- National Natural Science Foundation of China [21733005, 51773087, 51903116]
- Shenzhen Fundamental Research Program [JCYJ20170817111214740, KQJSCX20180319114442157]
- Shenzhen Nobel Prize Scientists Laboratory Project [C17213101]
- Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06G587]
Ask authors/readers for more resources
Chlorine-substituted conjugated polymers not only possess simple and high-yield synthetic steps due to the cheap raw materials available for their synthesis but also exhibit great potential for the commercial application of polymer solar cells (PSCs) with excellent photovoltaic performance. However, the current research of chlorine-substituted donor polymers is lagging compared to the rapid development of chlorinated acceptors. Here, a chlorine-free polymer PTBT and a chlorinated donor polymer PTBT-Cl were prepared and studied in parallel. The chlorine-substituted polymer PTBT-Cl showed a much lower highest occupied molecular orbital (HOMO) level value of 5.46 eV and an enhanced aggregation behavior in film, achieving an optimized phase separation morphology in blend with an efficient acceptor compared with that of PTBT. Surprisingly, the chlorine-free PTBT-based PSCs showed a negligible power conversion efficiency (PCE) of 3.88%, while the PTBT-Cl exhibited a decent PCE of 12.31%, with a simultaneously increased short circuit current density (J(sc)) of 23.73 mA cm(-2) and a fill factor (FF) of 62.53%, when matched with the fused-ring electron acceptor (FREA) Y6. This work provides new insight into the economical design and synthesis of chlorine-substituted polymers, boosting the photovoltaic performance of PSCs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available